True-bore-forming guide for rotary drill stems



Aug; 19, 1930. 1,173,231

TRUE BORE FORHING GUIDE 1 0R ROTARY DRILL STEIS v F. C. LAWRENCE ET AL Filed July 25, 1929 2 Sheets-Sheet l gwuafltoc 0. La W re nae Win Zens Aug. 19, 1930. F. c. LAWRENCE ET AL 1,773,231.,

Thur: BORE FORMING GUIDE FQR ROTARY DRILL s'rEns Filed July 25, 1929 2 Sheets-Sheet 2 30 up reamer thereof. r

v in 1"?- 9 of forming a bore;

Patented Aug. 19, 1930 l v UNITED ts -Terms PATENT OFFICE I rnnn c nnwnnncnnnn ronn r wnv'rn ns, or ELnonADo, muvsAs V TnuE-BonE-roRnrNe GUIDE re enerate-1L s'rnius I Application filed re y zsiiszs. semina 380,941. V

This invention relates to deep Well drilltion and partly in elevation of the upper poring lapparatusof that type embodying a r- 1 tion of the'guide andtheadjacent, portion titllffidllll stem. I I v of the drillstern;

, he invention has for one of its objects'to Figure l'i's" a sectional view (taken on the insure the formation of true vertical bores horizontal plane indicated by the line4'4 of by apparatus of this character, and to attain Figure 2;" I f f thisand other objects, the inventioncomprev Figure 5 is a sectional view'taken'on the hends the provision of a novel guide which horizontal plane indicated by theline 55 .jof

shall beadaptedto prevent slanting strata Figure "2;; and a o mof hard formation from deflecting the bit Figure 6, is a sectional view taken on a' from its perpendicular path. o j plane extending vertically and centrally.

The invention further cornprehends the through the lower portion of the guide. I provision of a guide of the character stated Referring in detail to the. draWing SQI deswhiclr shall beadapted to be applied to 'the ignatestherock drill or bit, l the lower orbit drill stein immediately ab'ovefthebit and rerearner, 2 theupper or followup rea 1ner,and, no main outtof contactwith the wall of the bore 3 the pipeo'f a rotary drill stem, which is il-r during the vertical descentof thebit, Which lustrated as having formed a vertical bore 4 shall be adapted on the deflection ofthebit to through strata of shale 5, a slanting stratum contactjwithfthe wall of the bore and cause of rock 6 anda horizontal straturnofrock 7,

20 thebitto travelvertically downward through and Which isillustrated as continuing the 5 the hard strata an which when in "contact bore vertically throughaslanting stratum of with thewall-of thebore shall be adapted to solid rock 8'. As the parts 1,2 and3 are of ofier littleor no resistance:tothe rotation of well known construction,they are illustrated the stenrf V l V diagra-lnn a-tically and afurther description 25 The invention still further comprehends ofthe saine is deemed unneciasszatry. I

the provision/of arg'uide of the character Inaccordance with our-invention',,the drill stated which shall be simple and durable and stem is-provided, between itsbit reamer 1 and capableof being readily applied to; the drill its followrup reanier 2, witha guide'Wh-ich is stein between-the bit reamenand the follow adapted tocause the bitflto follow a vertical Q i or perpendicular path- .This guide comprises The invention consistsin theconstruction, asteln 9 of hollow formation'andhaving'its combination and arrangement'ef parts .herelower and upper] ends externallyscrew inafter fullydescribed and clairnedand illusthreaded for the application thereto of; coltrated' in the accompanying drawings,Where. lars 10 and 11 An upset or tube 12 surrounds I I i 1 f the sten1'9. The tube 12isshorter than the v Figure 1 is a view in side elevationfof the stem9, and-is arranged upon the stern with its lowerportionof. a drill stem. equipped with a' endssimilarly spaced from the ends of the guide {constructed in accordance-with:our in stem;- The tube r 12 isprovided with inner vention'," the'stein being illustrated in"theact' annular, shoulders 13 which are :similarly p spaced from the; ends thereof. Radialthrust Figure 2. is a sectional viewltaken ion a bearings :14 are arranged between the stem 9 lane, extending vertically, and centrally andtube'12, and axial thrust bearings 15 are though th'e'guide, the guide'beingshownin arranged betweenthe collars 10 and lland normalflposition in' the bore; 7 thetube. f M i 1 Fi ure ii evipar l ie e t been reed-w a h ft z ilztti 9 a end portions of the tube 12, and are maintained against axial displacement in the direction of each other by the shoulders 13.

adjacent or outer ends of, the sleeYes 16, and

connected to seamstress?! tenhxially from theout r end sof the sleeves and engaging in slot's'2 es w he s- 1? estate 1 I i 421011 by spacing ripgsfl I h '1 I ulmwh ms 1 on zltli e end of therohers. lsgeev s 16 cona? v V H r; I, actingyrollers I W1 the sleeves or con nersby the stem 9 ale nd. 213 b e B M ua s as h m l s a th y seems-de am m c at; r msr a d Q iift hpbythe collars f ofhqllowfforma- L i fhe a'een t tamer Ian'd the mm atiy twen [feet m 1 911K H h i as. ar-. fiieb' tw e i was ms he de w eevn. xe a e i e i l A l ave eit s e of a e' l webmast rs? outdf a is; ass-16. 3 5? este be carried into contact with the wall of the bore. The contact between the tube 12 and the wall of the bore resists the further deflection of the bit and tends to force the bit to continue straight downwardly through the hard strata. After the bit has been guided into its proper path, the tube 12 will again occupy its spaced relation with respect to the wall of the bore. When the tube 12 is in contact with the wall of the bore, it does not interfere with the free rotation of the drill stem due to the fact that it is mounted on the stem 9 through the medium 'of"radial andaxial thrust bearings, the bearings being of such "construction andso arranged astoipsure the I tact with the wall of the bore. After the tube in "thepei'iph 12 passed ehssman deflection in the wall ofthe bore caused by the slight deflection of th e'bit necessary to. carry the tube into con-. N met with thewall of theb'ore, the follow-up shares; an pr fl reamer 2 will free the bore of this deflection; the. that 'th andf'bit'may be removed fromthefbore whenever de-' .7 i. .1 J 1 g I Thereis no tension or weight onthe' tube 12fwh1'le' the bit is followin avertical .path.

The tube 12 rides freely wi, the drill audit is never under a y tQf Q' 1 mm. L

t gh fn g g Thg l e s 5 11, c I i es e rd 1 s tetweenin drill' P gm W liedwithduhri'cantwheneverthe drill stem is'renioved froin"thebor 'forthe'purpose of nstal i sa e h y .d se it f r h deflection of the'bit hasbe'enarrested and the bit proceeds downwardly, the contact betweengthe' "tube 12 and the 5 wall of the bore w llnbt interferewith'tlie free rotation of tIie P 'PQtVdue'to the 'mounftin ,of 'the tube through the medium ofthe ra" ial and axial fwefhave described the principle'of. he in entive g h r, w t Structure which wendw consider the preferred eIn-, ed m pt ths tea it t tabe ns qed i fiiestguc iire's'llewai ms y s re ve' m tha -s e apes m I ea s e esiredms isllt within.- these peio theinwntionas clalme r eg are her-se ies ,iiit t "t e [h iid iii "cbntait with' the shoulde gx, wash rs arranged on the stem in contact with the ends of the tube, sleeves arranged within and contacting with the tube and having their ends connected to the washers, and bearing rollers arranged between and contacting with the stem and sleeves.

In testimony whereof we hereunto aflix our signatures.

FRED G. LAWRENCE. JOHN P. WINTERS. 

